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                                <h1 id="&#x751F;&#x547D;&#x5468;&#x671F;&#x51FD;&#x6570;">&#x751F;&#x547D;&#x5468;&#x671F;&#x51FD;&#x6570;</h1>
<p>&#x6709;&#x7684;&#x65F6;&#x5019;&#xFF0C;&#x6211;&#x4EEC;&#x5E0C;&#x671B;&#x5728;&#x5B58;&#x50A8;&#x4E4B;&#x524D;&#x5E72;&#x70B9;&#x4EC0;&#x4E48;&#xFF0C;&#x6BD4;&#x5982;&#x628A;&#x7528;&#x6237;&#x7684;&#x5BC6;&#x7801;&#x8FDB;&#x884C; Hash &#x4E00;&#x4E0B;&#x3002;&#x8FD9;&#x4E2A;&#x65F6;&#x5019;&#x5C31;&#x9700;&#x8981;&#x7528;&#x5230;&#x751F;&#x547D;&#x5468;&#x671F;&#x51FD;&#x6570;&#x4E86;&#x3002;</p>
<p>&#x751F;&#x547D;&#x5468;&#x671F;&#x51FD;&#x6570;&#x6709;&#x54EA;&#x4E9B;&#xFF1F;&#x6709;&#x54EA;&#x4E9B;&#x79CD;&#x7C7B;&#xFF1F;</p>
<p>&#x652F;&#x6301;&#x7684;&#x751F;&#x547D;&#x5468;&#x671F;&#x51FD;&#x6570;&#x5982;&#x4E0B;</p>
<pre><code class="lang-ts">(<span class="hljs-number">1</span>)
  beforeBulkCreate(instances, options)
  beforeBulkDestroy(options)
  beforeBulkUpdate(options)
(<span class="hljs-number">2</span>)
  beforeValidate(instance, options)
(-)
  validate
(<span class="hljs-number">3</span>)
  afterValidate(instance, options)
  - or -
  validationFailed(instance, options, error)
(<span class="hljs-number">4</span>)
  beforeCreate(instance, options)
  beforeDestroy(instance, options)
  beforeUpdate(instance, options)
  beforeSave(instance, options)
  beforeUpsert(values, options)
(-)
  create
  destroy
  update
(<span class="hljs-number">5</span>)
  afterCreate(instance, options)
  afterDestroy(instance, options)
  afterUpdate(instance, options)
  afterSave(instance, options)
  afterUpsert(created, options)
(<span class="hljs-number">6</span>)
  afterBulkCreate(instances, options)
  afterBulkDestroy(options)
  afterBulkUpdate(options)
</code></pre>
<p>&#x8FD9;&#x4E9B;&#x5468;&#x671F;&#x51FD;&#x6570;&#x5206;&#x4E3A;&#x5168;&#x5C40;&#x7684;&#x4E0E;&#x6A21;&#x578B;&#x7EA7;&#x522B;&#x7684;&#x3002;</p>
<h3 id="&#x5168;&#x5C40;&#x7EA7;&#x522B;">&#x5168;&#x5C40;&#x7EA7;&#x522B;</h3>
<pre><code class="lang-ts"><span class="hljs-keyword">const</span> sequelize = <span class="hljs-keyword">new</span> Sequelize(..., {
    define: {
        hooks: {
            beforeCreate: () =&gt; {
                <span class="hljs-comment">// Do stuff</span>
            }
        }
    }
});
</code></pre>
<h3 id="&#x6A21;&#x578B;&#x7EA7;&#x522B;">&#x6A21;&#x578B;&#x7EA7;&#x522B;</h3>
<pre><code class="lang-ts"><span class="hljs-keyword">const</span> Project = sequelize.define(<span class="hljs-string">&apos;project&apos;</span>, {}, {
    hooks: {
        beforeCreate: () =&gt; {
            <span class="hljs-comment">// Do other stuff</span>
        }
    }
});
</code></pre>
<h3 id="&#x5B9A;&#x4E49;&#x751F;&#x547D;&#x5468;&#x671F;&#x7684;&#x4E09;&#x79CD;&#x65B9;&#x5F0F;">&#x5B9A;&#x4E49;&#x751F;&#x547D;&#x5468;&#x671F;&#x7684;&#x4E09;&#x79CD;&#x65B9;&#x5F0F;</h3>
<p>1.options</p>
<pre><code class="lang-ts"><span class="hljs-keyword">const</span> Project = sequelize.define(<span class="hljs-string">&apos;project&apos;</span>, {}, {
    hooks: {
        beforeCreate: () =&gt; {
            <span class="hljs-comment">// Do other stuff</span>
        }
    }
});

<span class="hljs-keyword">const</span> sequelize = <span class="hljs-keyword">new</span> Sequelize(..., {
    define: {
        hooks: {
            beforeCreate: () =&gt; {
                <span class="hljs-comment">// Do stuff</span>
            }
        }
    }
});
</code></pre>
<p>2.&#x8C03;&#x7528;&#x5BF9;&#x5E94;&#x7684;&#x65B9;&#x6CD5;</p>
<pre><code class="lang-ts">sequelize.afterValidate(<span class="hljs-string">&apos;xxx&apos;</span>, () =&gt; {....})
User.afterValidate(<span class="hljs-string">&apos;myHookAfter&apos;</span>, (user, options) =&gt; {
  user.username = <span class="hljs-string">&apos;Toni&apos;</span>;
});
</code></pre>
<p>3.&#x8C03;&#x7528; addHook</p>
<pre><code class="lang-ts">sequelize.addHook(<span class="hljs-string">&apos;xxx&apos;</span>, () =&gt; {....})
User.addHook(<span class="hljs-string">&apos;afterValidate&apos;</span>, <span class="hljs-string">&apos;notifyUsers&apos;</span>, () =&gt; {....})
</code></pre>
<h3 id="&#x547D;&#x540D;&#x751F;&#x547D;&#x5468;&#x671F;&#x51FD;&#x6570;">&#x547D;&#x540D;&#x751F;&#x547D;&#x5468;&#x671F;&#x51FD;&#x6570;</h3>
<p>&#x53D6;&#x4E00;&#x4E2A;&#x53EB; notifyUsers &#x7684;&#x540D;&#x5B57;</p>
<pre><code class="lang-ts">User.afterValidate(<span class="hljs-string">&apos;myHookAfter&apos;</span>, (user, options) =&gt; {
  user.username = <span class="hljs-string">&apos;Toni&apos;</span>;
});

User.addHook(<span class="hljs-string">&apos;afterValidate&apos;</span>, <span class="hljs-string">&apos;notifyUsers&apos;</span>, () =&gt; {....})
</code></pre>
<h3 id="&#x79FB;&#x9664;&#x751F;&#x547D;&#x5468;&#x671F;&#x51FD;&#x6570;">&#x79FB;&#x9664;&#x751F;&#x547D;&#x5468;&#x671F;&#x51FD;&#x6570;</h3>
<p>&#x53EA;&#x6709;&#x88AB;&#x547D;&#x540D;&#x4E86;&#x7684;&#x751F;&#x547D;&#x5468;&#x671F;&#x51FD;&#x6570;&#x624D;&#x53EF;&#x79FB;&#x9664;</p>
<pre><code class="lang-ts">Book.removeHook(<span class="hljs-string">&apos;afterValidate&apos;</span>, <span class="hljs-string">&apos;notifyUsers&apos;</span>);
</code></pre>

                                
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